Change port parameter at console interface to support more than one switches\n Modify dell.py at line 118
Change Port class to make it work with stacked-swtches

Fix #52
Merge branch 'devel' into stacked-switches
Change test port for stacked-switches
Change tab expanding for python file
Remove unnecessary comment in test_common.py
Merge branch 'devel' into stacked-switches

Conflicts:
	haas/drivers/dell.py
Merge pull request #207 from yiyunma/stacked-switches

Stacked switches